Combo box - Reg

Combo box - Reg

Hi...
I have acombo box as Status in Pop-up page where i should show only " Further Approval , Approved and Rejected " as statuses in that. But actually in my status entity i have " In-Progress , Pending Requst , Further Approval , Approved and Rejected " as attributes , so it's showing all these things there. So i need to know whether do we have any method to get only those three ststus there? And the next doubt is in the same Pop-up page in " Assigned to " column i have to display it only for " Further Approval " . I have also tried it with " If " but still i don't get the proper things. I have enclosed my " .oml " file for your verification. Please clear this two doubts.